import java.util.ArrayList;
import java.util.Collections;
import java.util.ConcurrentModificationException;
import java.util.concurrent.ConcurrentHashMap;

/*
    @author:sa
    @date:2024/11/29 16:20
*/
public class CollectionsDemo {
    public static void main(String[] args) {
        ArrayList<String> arrayList = new ArrayList<>();
        arrayList.add("b");
        arrayList.add("a");
        arrayList.add("c");
        arrayList.add("e");
        Collections.sort(arrayList);
        System.out.println(arrayList);
        ConcurrentHashMap<String, String> Map = new ConcurrentHashMap<>();
    }
}